JP4658602B2 - Mixture for producing compression molded products - Google Patents

Mixture for producing compression molded products Download PDF

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JP4658602B2
JP4658602B2 JP2004538861A JP2004538861A JP4658602B2 JP 4658602 B2 JP4658602 B2 JP 4658602B2 JP 2004538861 A JP2004538861 A JP 2004538861A JP 2004538861 A JP2004538861 A JP 2004538861A JP 4658602 B2 JP4658602 B2 JP 4658602B2
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mixture
molding aid
polyglycol
molding
montan wax
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JP2006500446A (en
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ルネ リンデノー，
クラウス ドルメイヤー，
フォルカー アーンホルド
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ジーケイエヌ ジンテル メタルズ ゲゼルシャフト ミット ベシュレンクテル ハフツング
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/60—Aspects relating to the preparation, properties or mechanical treatment of green bodies or pre-forms
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    • C08L2666/00—Composition of polymers characterized by a further compound in the blend, being organic macromolecular compounds, natural resins, waxes or and bituminous materials, non-macromolecular organic substances, inorganic substances or characterized by their function in the composition
    • C08L2666/02—Organic macromolecular compounds, natural resins, waxes or and bituminous materials
    • C08L2666/14—Macromolecular compounds according to C08L59/00 - C08L87/00; Derivatives thereof
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Abstract

Certain preferred embodiments of the present invention relate to compositions for the production of sintered molded parts, components/parts produced therefrom, and methods for preparing such compositions. In accordance with certain embodiments, compositions for production of sintered molded parts comprise a metal-based, a ceramic-based, and/or a polymer-based powder, and a compaction aid, having 25 to 60 weight percent of a polyglycol, based on the total weight of the compaction aid, and 40 to 75 weight percent of a montan wax, based on the total weight of the compaction aid. The compaction aid may be present in an amount from about 0.1 to 5 weight percent, preferably 0.5 to 1.5 weight percent, based on the total weight of the composition. The composition may also include a lubricant such as, for example, MoS2, WS2, BN, MnS, and/or carbon.

Description

本発明は、圧縮成形品を製造するための混合物、この混合物を製造するための方法およびその使用に関する。 The present invention relates to a mixture for producing a compression molded article , a method for producing this mixture and its use.

焼結成形品はさまざまに、特に自動車製造において、そこで特に成形品としてエンジンおよび変速機において利用されている。焼結成形品の製造時における１つの困難は、極力高い密度でこれを製造することにある。焼結可能な粉末から通常の粉末冶金法によって単ステップまたは多ステップで圧縮成形される一般に成形体と称される成形品は第２ステップにおいて保護雰囲気下で焼結され、強固で形状も正確な金属成形品が得られる。   Sintered moldings are used in various ways, especially in automobile manufacturing, where they are used in particular in engines and transmissions as moldings. One difficulty in the production of sintered moldings is to produce them with the highest possible density. A molded product, generally called a molded product, which is compression-molded from a sinterable powder in a single step or in multiple steps by conventional powder metallurgy, is sintered in a protective atmosphere in the second step, and is strong and accurate in shape. A metal molded product is obtained.

このようにして得られる焼結成形品の密度は第１圧縮成形ステップで達成される成形体密度、いわゆるグリーン密度（圧粉密度）に本質的に依存している。それゆえに、既に第１操作ステップにおいて極力高い密度を有する成形体を製造することは追求するに値する。しかし成形体を高密度で製造するための技術の現状で通常応用される高い圧縮成形圧力は圧縮成形工具自体の高い摩耗を帰結し、さらには圧縮成形金型内で仕上げられた成形体の抜出し滑り摩擦も高くする。そのためここでは比較的高い抜出し力を相応に高い摩耗で圧縮成形工具に加えねばならない。さらに、高い抜出し力は成形体の望ましくない局所的再圧縮と亀裂形成の危険をはらんでいる。そこで本発明の課題は、前記諸欠点を防止した混合物を提供することである。   The density of the sintered molded product thus obtained essentially depends on the green density (green density) achieved in the first compression molding step. It is therefore worth pursuing to produce a shaped body that has already the highest density in the first operating step. However, the high compression molding pressure normally applied in the current state of the art for producing compacts at high density results in high wear of the compression molding tool itself, and also the extraction of the finished compact in the compression mold. Increase sliding friction. For this reason, a relatively high extraction force must be applied here to the compression molding tool with a correspondingly high wear. Furthermore, the high extraction force carries the risk of undesirable local recompression and crack formation of the compact. Accordingly, an object of the present invention is to provide a mixture that prevents the above-mentioned drawbacks.

この課題を解決するために、金属材料および／またはプラスチック材料と成形助剤とを含み、成形助剤が成形助剤総量に対して２５〜６０重量％のポリグリコールと成形助剤総量に対して４０〜７５重量％のモンタン蝋とを含む、圧縮成形品を製造するための混合物が提案される。
In order to solve this problem, a metal material and / or plastic material and a molding aid are included, and the molding aid is 25 to 60% by weight of the total amount of the polyglycol and the molding aid, A mixture for producing a compression-molded article comprising 40 to 75% by weight of montan wax is proposed.

本発明の意味における焼結可能な成形品とは全て焼結性材料から製造された成形品のことであり、他方で複合品もそこに含まれ、このような複合品の本体は例えばアルミニウム含有または鉄含有混合物から製造しておくことができ、この本体にさらに結合される物体は他の材料、例えば焼結鋳鋼または中実鋳鋼、または中実アルミニウム鋳物から製造しておくことができる。その逆に複合品は例えば単に正面またはその表面に、例えばアルミニウム含有またはセラミック含有混合物からなる焼結層を有することもでき、他方で本体は例えば焼結または中実の鋼または鋳鉄からなる。その際、焼結成形品は熱中で矯正および／または硬化しておくことができる。   A sinterable molded product in the sense of the present invention is a molded product produced from a sinterable material, on the other hand, including a composite product, the body of such a composite product containing, for example, aluminum. Or it can be made from an iron-containing mixture, and the object further bonded to this body can be made from other materials, such as sintered or solid cast steel, or solid aluminum casting. Conversely, the composite can also have, for example, a sintered layer made of, for example, an aluminum-containing or ceramic-containing mixture on the front or on its surface, while the body consists of, for example, sintered or solid steel or cast iron. At that time, the sintered molded article can be straightened and / or cured in heat.

本発明の意味における金属材料および／またはプラスチック材料は特に金属成分、セラミック成分および／またはプラスチック成分、例えばクロムニッケル鋼、青銅、ハステロイ（登録商標）、インコネル（登録商標）、金属酸化物、金属窒化物、金属ケイ化物または類似物等のニッケル系合金からなる粉末もしくは混合物、さらにはアルミニウム含有粉末もしくは混合物であり、混合物は、例えば白金または類似物等の高融点成分も含むことができる。使用される粉末およびその粒径はその都度の利用目的に依存している。好ましい鉄含有粉末は合金３１６Ｌ、３０４Ｌ、インコネル６００、インコネル６２５、モネル（登録商標）、およびハステロイＢ、Ｘ、Ｃである。さらに、金属材料および／またはプラスチック材料は完全にまたは部分的に短繊維もしくは繊維製、主に直径約０．１〜２μｍ、長さ数μｍから５０ｍｍまでの繊維製とすることができる。   Metal materials and / or plastic materials in the sense of the invention are in particular metal components, ceramic components and / or plastic components, such as chromium nickel steel, bronze, Hastelloy®, Inconel®, metal oxides, metal nitrides. , Powders or mixtures of nickel-based alloys such as metal silicides or the like, as well as aluminum-containing powders or mixtures, the mixture can also contain high melting point components such as platinum or the like. The powder used and its particle size depend on the intended use in each case. Preferred iron-containing powders are alloys 316L, 304L, Inconel 600, Inconel 625, Monel®, and Hastelloy B, X, C. Furthermore, the metal material and / or the plastic material can be made entirely or partially of short fibers or fibers, mainly made of fibers with a diameter of about 0.1 to 2 μm and a length of several μm to 50 mm.

本発明の意味におけるモンタン蝋は、第三紀植物の樹脂、蝋および脂肪から生じた褐炭の瀝青である。これは、長鎖蝋アルコールを有するいわゆるモンタン酸（脂肪酸）のエステル、特にＣ20〜Ｃ36脂肪酸エステル、好ましくはＣ24〜Ｃ34脂肪酸エステルである。前記成分の他に、モンタン蝋は他の遊離脂肪酸および遊離蝋アルコール、モンタン樹脂、ケトン、およびアスファルト状材料を含むことができる。モンタン蝋はふつうさまざまな脂肪酸エステルの混合物である。好ましいモンタン蝋は酸価［ｍｇ ＫＯＨ／ｇ］が５〜３０、さらに好ましくは１０〜２５の範囲内、および／または鹸化価［ｍｇ ＫＯＨ／ｇ］が１００〜２００、さらに好ましくは１２０〜１６０の範囲内である。１００℃における粘度［ｍＰａｓ］は主に１０〜４０、さらに好ましくは１５〜３５の範囲内である。 Montan wax in the sense of the present invention is a bituminous lignite produced from Tertiary plant resins, waxes and fats. This is an ester of so-called montanic acid (fatty acid) with a long-chain wax alcohol, in particular a C 20 -C 36 fatty acid ester, preferably a C 24 -C 34 fatty acid ester. In addition to the above components, montan wax can include other free fatty acids and free wax alcohols, montan resins, ketones, and asphalt-like materials. Montan wax is usually a mixture of various fatty acid esters. Preferred montan wax has an acid value [mg KOH / g] of 5 to 30, more preferably in the range of 10 to 25, and / or a saponification value [mg KOH / g] of 100 to 200, more preferably 120 to 160. Within range. The viscosity [mPas] at 100 ° C. is mainly in the range of 10 to 40, more preferably 15 to 35.

意外なことに、定義された成形助剤を焼結性材料に添加することによって金属冶金圧縮成形法で製造できる成形体は一方で著しく高い値の圧粉体強度および圧粉密度を特に使用される圧縮成形工具の室温時に有し、さらに成形体を圧縮成形工具から取り出すときかなり小さな抜出し力で可能となることが判明した。これにより一方で使用される圧縮成形工具の摩耗がかなり減少し、他方で製造される成形体の亀裂形成または局所的再圧縮の危険が減少している。さらに、本発明に係る混合物で達成可能な圧粉密度は特に工具の室温時に高まっており、最終加工され焼結された成形品の圧粉密度付近である。   Surprisingly, compacts that can be produced by the metallurgical metallurgical compression process by adding defined forming aids to the sinterable material, on the other hand, are particularly used for significantly higher values of green strength and green density. It has been found that the compression molding tool can be used at room temperature, and when the molded body is taken out from the compression molding tool, it can be obtained with a considerably small extraction force. This significantly reduces the wear of the compression molding tool used on the one hand and reduces the risk of crack formation or local recompression of the molding produced on the other hand. Furthermore, the green density achievable with the mixture according to the invention is particularly high when the tool is at room temperature and is in the vicinity of the green density of the final processed and sintered shaped product.

本発明に係る混合物はさらに他の成分、特に潤滑剤を、混合物総量に対して好ましくは０．２〜５重量％の量、含有することができる。その際潤滑剤として使用できるのは一方で自己潤滑剤、例えばＭｏＳ2、ＷＳ2、ＢＮ、Ｎ、ｎＳ、そしてコークス、分極黒鉛等の黒鉛および／または別の炭素改質物等である。主に１〜３重量％の潤滑剤が焼結性混合物に添加される。前記潤滑剤の投入によって、焼結性混合物から製造される成形品に自己潤滑性を付与することができる。 The mixture according to the invention can further contain other components, in particular lubricants, preferably in an amount of 0.2 to 5% by weight, based on the total amount of the mixture. On the one hand, self-lubricants such as MoS 2 , WS 2 , BN, N, nS and graphite such as coke, polarized graphite and / or other carbon modifiers can be used as lubricants. Mainly 1-3% by weight of lubricant is added to the sinterable mixture. By introducing the lubricant, self-lubricating property can be imparted to a molded product produced from the sinterable mixture.

本発明に係る混合物はさらにその他の滑剤またはアエロジル（登録商標）を含むことができる。本発明に係る混合物は揺動回転型混合機等の通常の装置を使って個々の成分を混合することによって熱間（熱間混合）でも室温（冷間混合）でも製造することができ、熱間混合が好ましい。   The mixture according to the invention can further comprise other lubricants or Aerosil®. The mixture according to the present invention can be produced either hot (hot mixing) or at room temperature (cold mixing) by mixing individual components using an ordinary apparatus such as a rocking rotary mixer. Intermixing is preferred.

それぞれ成形助剤総量に対して３０〜５５重量％、さらに好ましくは３２〜５３重量％のポリグリコールと４５〜７０重量％のモンタン蝋とを含む混合物が好ましい。   Preference is given to mixtures comprising 30 to 55% by weight, more preferably 32 to 53% by weight of polyglycol and 45 to 70% by weight of montan wax, respectively, relative to the total amount of molding aid.

本発明に係る混合物の成形助剤に含まれるポリグリコールは有利にはポリエチレングリコールを含む。本発明の意味においてポリエチレングリコールとは分子量の異なるポリエチレングリコールの混合物も含まれる。その際特別有利には、モル質量が約１００〜２００００ｇ／ｍｏｌ、好ましくは１００〜７０００ｇ／ｍｏｌ、さらに好ましくは１００〜６５００ｇ／ｍｏｌ、なお一層好ましくは３０００〜６０００ｇ／ｍｏｌの範囲内のポリエチレングリコールが使用される。前記ポリエチレングリコールの大きな利点は、それらが一般に４０〜１００℃の範囲内の比較的低い軟化点を有し、そのため金属冶金法で使用される圧縮成形金型に冷材料を充填することが可能であり、そのため瘤形成等が防止される事実にある。圧縮成形過程時に工具が温まると、選択されたポリエチレングリコールは投入されるモンタン蝋と一緒に潤滑を可能とし、製造される成形体の比較的高い圧粉密度が、そして圧粉体強度も達成される。   The polyglycol contained in the molding aid of the mixture according to the invention preferably comprises polyethylene glycol. In the meaning of the present invention, a mixture of polyethylene glycols having different molecular weights from polyethylene glycol is also included. Particularly advantageously, polyethylene glycol having a molar mass in the range of about 100 to 20000 g / mol, preferably 100 to 7000 g / mol, more preferably 100 to 6500 g / mol, even more preferably 3000 to 6000 g / mol. used. The great advantage of the polyethylene glycols is that they generally have a relatively low softening point in the range of 40-100 ° C., so that it is possible to fill cold molds in compression molds used in metallurgical processes. Therefore, the formation of an aneurysm is prevented. As the tool warms up during the compression molding process, the selected polyethylene glycol can be lubricated with the input montan wax, resulting in a relatively high green density and green strength of the resulting molded body. The

本発明に係る混合物の成形助剤に含まれたモンタン蝋は有利にはＣ24‐Ｃ34脂肪酸をベースとする脂肪酸エステルを含む。 The montan wax contained in the molding aid of the mixture according to the invention preferably comprises fatty acid esters based on C 24 -C 34 fatty acids.

本発明はさらに、本発明に係る混合物を製造するための方法であって、
第１ステップでは成形助剤に含まれるポリグリコールとモンタン蝋が一緒に溶解され、
第２ステップでは第１ステップにより製造された成形助剤が金属材料および／またはプラスチック材料に添加されるものに関する。 The invention further comprises a process for producing a mixture according to the invention,
In the first step, the polyglycol and montan wax contained in the molding aid are dissolved together,
In the second step, the molding aid produced in the first step is added to the metal material and / or the plastic material.

好ましくはさらに、本発明に係る方法の第１ステップ後、得られて、冷却された熱溶物が粉砕または噴霧される。意外なことに、本発明に係る方法では製造された成形体は技術の現状により公知の成形助剤で通常達成可能な圧粉体強度よりもかなり高い圧粉体強度を得ることが判明した。   Preferably, furthermore, after the first step of the method according to the invention, the obtained and cooled hot melt is ground or sprayed. Surprisingly, it has been found that in the process according to the present invention, the molded bodies produced have a green strength which is considerably higher than that normally achievable with known molding aids due to the state of the art.

選択的に使用される方法では、
第１ステップでは成形助剤に含まれるポリグリコールとモンタン蝋が一緒に混合され、
第２ステップでは第１ステップにより製造される成形助剤が金属材料および／またはプラスチック材料に添加される。 In the selectively used method,
In the first step, polyglycol and montan wax contained in the molding aid are mixed together,
In the second step, the molding aid produced in the first step is added to the metal material and / or plastic material.

この選択的方法によって金属冶金圧縮成形過程後に得られる成形体も、技術の現状により公知の通常の成形助剤で得られるものよりも上の圧粉体強度を有する。さらに本発明は、焼結成形品を製造することへの本発明に係る混合物の使用に関する。さらに本発明は、請求項１〜４記載の成形助剤に関する。   A compact obtained after the metallurgical metallurgical compression molding process by this selective method also has a green compact strength higher than that obtained by a known ordinary molding aid according to the current state of the art. The invention further relates to the use of the mixture according to the invention for producing sintered molded articles. Furthermore, this invention relates to the shaping | molding adjuvant of Claims 1-4.

最後に本発明は、本発明に係る混合物から製造され、使用される圧縮成形工具の室温と６００ＭＰａの圧力とにおいてＩＳＯ ３９９５‐１９８５による圧粉体強度が７．５５Ｎ／ｍｍ2よりも大きい成形体に関する。本発明に係る成形体は有利にはさらに、８００ＭＰａと使用される圧縮成形工具の室温とにおいてＩＳＯ ３９２７／１９８５による圧粉密度が少なくとも７．１４ｇ／ｃｍ3である。 Finally, the present invention relates to a molded body having a green compact strength according to ISO 3395-1985 greater than 7.55 N / mm 2 at room temperature and a pressure of 600 MPa of the compression molding tool produced and used from the mixture according to the present invention. About. The shaped bodies according to the invention furthermore preferably have a green density according to ISO 3927/1985 of at least 7.14 g / cm 3 at 800 MPa and the room temperature of the compression molding tool used.

本発明のこうした利点およびその他の利点が以下の実施例を基に述べられる。   These and other advantages of the invention are described based on the following examples.

混合物が製造されたのはHoeganaes Corporation社、米国、の焼結可能な金属粉末Ancorsteel 85 HPからであったが、これは混合物総量に対してそれぞれ０．６５重量％の炭素と０．６重量％の下記成形助剤とを有するものである：
ａ）Licowax C、Clariant GmbH社、フランクフルト・アム・マイン。これはビスステアロイルエチレンジアミン（アミド蝋）である；
ｂ）Acrawax C、Lonza AG、バーゼル、スイス。これはＮ、Ｎ’‐エチレンビスステアルアミド（アミド蝋）である；
ｃ）Kenolube P11、Hoganas AB、Hoganas、スウェーデン。これは２２．５重量％のステアリン酸亜鉛と７７．５重量％のアミド蝋との混合物である；
ｄ）ポリグリコール6000 PF、Clariant GmbH、フランクフルト・アム・マイン。これはモル質量約６０００ｇ／ｍｏｌのポリエチレングリコールである；
ｅ）Licowax E、Clariant GmbH、フランクフルト・アム・マイン。これは酸価［ｍｇ ＫＯＨ／ｇ］が１５〜２０の範囲内、鹸化価が１３０〜１６０の範囲内であるＣ24‐Ｃ34脂肪酸のエステルからなるモンタン蝋である；
ｆ）成形助剤総量に対してそれぞれ６７重量％のLicowax Cと３３重量％のポリグリコール6000 PFとの混合物。この混合物はモンタン蝋とポリエチレングリコールとを一緒に溶解し、熱溶物を固化し、場合によっては次に（例えば液体窒素で）冷却し、引き続きそれを粉砕して粉末とすることによって製造されたものである；
ｇ）５０重量％のLicowax Cと５０重量％のポリグリコール6000 PFとの混合物。この混合物はモンタン蝋とポリエチレングリコールとを一緒に溶解し、熱溶物を固化し、場合によっては次に（例えば液体窒素で）冷却し、引き続きそれを粉砕して粉末とすることによって製造されたものである；
ｈ）６７重量％のLicowax Cと３３重量％のポリグリコール6000 PFとの混合物。この混合物は事前に溶解することなく通常の揺動回転型混合機内で混合されたものである；
ｉ）成形助剤総量に対してそれぞれ５０重量％のLicowax Cと５０重量％のポリグリコール6000 PFとの混合物であり、この混合物は事前に溶解することなく通常の揺動回転型混合機内で混合された。ｆ）、ｇ）による混合物粉砕の代わりに、熱溶物は噴霧することもできる。 The mixture was produced from the sinterable metal powder Ancorsteel 85 HP of Hoeganaes Corporation, USA, which was 0.65% carbon and 0.6% by weight, respectively, based on the total mixture With the following molding aids:
a) Licowax C, Clariant GmbH, Frankfurt am Main. This is bisstearoyl ethylenediamine (amide wax);
b) Acrawax C, Lonza AG, Basel, Switzerland. This is N, N'-ethylenebisstearamide (amide wax);
c) Kenolube P11, Hoganas AB, Hoganas, Sweden. This is a mixture of 22.5 wt% zinc stearate and 77.5 wt% amide wax;
d) Polyglycol 6000 PF, Clariant GmbH, Frankfurt am Main. This is a polyethylene glycol with a molar mass of about 6000 g / mol;
e) Licowax E, Clariant GmbH, Frankfurt am Main. This is a montan wax consisting of esters of C 24 -C 34 fatty acids with an acid number [mg KOH / g] in the range 15-20 and a saponification number in the range 130-160;
f) A mixture of 67% by weight of Licowax C and 33% by weight of polyglycol 6000 PF, respectively, relative to the total amount of molding aid. This mixture was prepared by dissolving montan wax and polyethylene glycol together, solidifying the hot melt, and then optionally cooling (eg, with liquid nitrogen) followed by grinding it into a powder. Is;
g) A mixture of 50% by weight Licowax C and 50% by weight polyglycol 6000 PF. This mixture was prepared by dissolving montan wax and polyethylene glycol together, solidifying the hot melt, and then optionally cooling (eg, with liquid nitrogen) followed by grinding it into a powder. Is;
h) A mixture of 67% by weight Licowax C and 33% by weight polyglycol 6000 PF. This mixture was mixed in a normal rocking rotary mixer without prior dissolution;
i) A mixture of 50% by weight of Licowax C and 50% by weight of Polyglycol 6000 PF, respectively, based on the total amount of the molding aid, and this mixture is mixed in a normal oscillating rotary mixer without dissolving in advance. It was done. Instead of crushing the mixture according to f) and g), the hot melt can also be sprayed.

添加される成形助剤の割合は、本発明に係る混合物の総量に対して一般に約０．１〜５重量％、好ましくは０．３〜３重量％、さらに好ましくは０．５〜１．５重量％の範囲内とすることができる。   The proportion of molding aid added is generally about 0.1 to 5% by weight, preferably 0.3 to 3% by weight, more preferably 0.5 to 1.5%, based on the total amount of the mixture according to the invention. It can be in the range of% by weight.

前記混合物が通常の圧縮成形工具に注入され、異なる圧力（４００、６００、８００ＭＰａ）において圧縮成形され、直径１４．３ｍｍ、長さ１２ｃｍの円筒体とされた。このようにして得られる成形体の物理的性質が表１と表２に示してあり、表１の値は工具温度２０℃（室温）とし、表２の値は工具温度７０℃としている。   The mixture was poured into a normal compression molding tool and compression molded at different pressures (400, 600, 800 MPa) into a cylinder with a diameter of 14.3 mm and a length of 12 cm. The physical properties of the molded bodies thus obtained are shown in Tables 1 and 2. The values in Table 1 are the tool temperature 20 ° C. (room temperature), and the values in Table 2 are the tool temperature 70 ° C.

Figure 0004658602
Figure 0004658602

Figure 0004658602
Figure 0004658602

表１と表２に示した値は各３つの測定から形成した平均値である。表１と表２に挙げた物理的性質は、見掛け密度についてはＩＳＯ規格３９２３‐１９７９に従って、流動時間についてはＩＳＯ ４４９０‐１９７８に従って、圧縮性についてはＩＳＯ ３９２７‐１９８５に従って、圧粉体強度についてはＩＳＯ ３９９５‐１９８５に従って算定された。表１と表２から読み取ることができるように、混合物ｆ）〜ｉ）から製造された成形体は圧粉体強度についてだけでなく圧粉密度についても高い値を有する。これらは技術の現状から公知の成形助剤を有する混合物ａ）、ｂ）、ｃ）による混合物を著しく凌駕しているが、成形助剤としてポリエチレングリコール（混合物ｄ））のみかまたはモンタン蝋（混合物ｅ））のみのいずれかを有するだけの混合物をも凌駕している。   The values shown in Tables 1 and 2 are average values formed from each of the three measurements. The physical properties listed in Tables 1 and 2 are: according to ISO standard 3923-1979 for apparent density, according to ISO 4490-1978 for flow time, according to ISO 3927-1985 for compressibility, and for green compact strength. Calculated according to ISO 3395-1985. As can be read from Tables 1 and 2, the shaped bodies produced from the mixtures f) to i) have high values not only for the green compact strength but also for the green compact density. These are significantly better than the mixtures a), b), c) having known molding aids from the state of the art, but only polyethylene glycol (mixture d)) or montan wax (mixture) as molding aids. e)) only surpasses mixtures with only one.

さらに、混合物ａ）〜ｉ）から得られる成形体について圧縮成形工具からの抜出し力が求められた。これが以下で表３と表４に示してある。表３は圧縮成形工具の室温（２０℃）、表４は圧縮成形工具の温度７０℃において求めた抜出し力を示す。   Furthermore, the extraction force from a compression molding tool was calculated | required about the molded object obtained from mixture a) -i). This is shown below in Tables 3 and 4. Table 3 shows the extraction force obtained at room temperature (20 ° C.) of the compression molding tool, and Table 4 shows the extraction force obtained at a temperature of 70 ° C. of the compression molding tool.

Figure 0004658602
Figure 0004658602

Figure 0004658602
Figure 0004658602

表３と表４から明確に読み取ることができるように、混合物ｆ）〜ｉ）から製造される成形体の抜出し力は混合物ａ）〜ｅ）から製造される成形体に比べて著しく低下している。抜出し力がここでは約２５％低い。これにより、使用される圧縮成形工具がかなり弱く負荷され、その摩耗が減少し、そのため寿命が長くなる。さらに、このようにして得られる圧粉体は局所的再圧縮または亀裂を殆ど有しない。   As can be clearly seen from Tables 3 and 4, the withdrawal force of the molded bodies produced from the mixtures f) to i) is significantly reduced compared to the molded bodies produced from the mixtures a) to e). Yes. The extraction force here is about 25% lower. This loads the compression molding tool used fairly weakly, reducing its wear and thus extending its life. Furthermore, the green compact obtained in this way has little local recompression or cracking.

単一混合物における公知混合物の周知の２つの欠点を減らす混合物が本発明によって提供される。つまり一方で本発明に係る混合物によって、これから得られる成形体の高い圧粉体強度とやはりその高い圧粉密度を達成することが可能であり、他方で圧縮成形工具からの抜出し力をかなり減らすことができ、これによりその寿命が長くなる。本発明に係る混合物から製造される成形体は優れた品質を有する。亀裂形成の減少と局所的再圧縮箇所形成の減少とによって、質的に同じで価値の高い成形体生産が確保されている。   A mixture is provided by the present invention that reduces the two known drawbacks of known mixtures in a single mixture. That is, on the one hand, the mixture according to the invention makes it possible to achieve a high green compact strength and also a high green density of the compacts obtained from it, and on the other hand to considerably reduce the extraction force from the compression molding tool. Which can increase its lifespan. The molded body produced from the mixture according to the present invention has excellent quality. The reduction in crack formation and the reduction in local recompression site formation ensure the same qualitatively high value molded product production.

Claims (9)

圧縮成形品を製造するための混合物であって、金属材料および／またはプラスチック材料と成形助剤とを含み、上記成形助剤が成形助剤総量に対して２５〜６０重量％のポリグリコールと成形助剤総量に対して４０〜７５重量％のモンタン蝋とを含み、
上記成形助剤は、１００〜６５００ｇ／ｍｏｌの分子量のポリエチレングリコールを含み、
モンタン蝋がＣ２４−Ｃ３４脂肪酸エステルを含むことを特徴とする混合物。A mixture for producing a compression-molded article, comprising a metal material and / or plastic material and a molding aid, wherein the molding aid is molded with 25 to 60% by weight of polyglycol based on the total amount of the molding aid. 40 to 75% by weight of montan wax based on the total amount of auxiliary agent,
The molding aid includes polyethylene glycol having a molecular weight of 100 to 6500 g / mol,
Mixture montan wax characterized in that it comprises a C 24 -C 34 fatty acid esters. ポリグリコールがポリエチレングリコールを含むことを特徴とする、請求項１に記載の混合物。  The mixture according to claim 1, characterized in that the polyglycol comprises polyethylene glycol. 請求項１または２に記載の混合物を製造するための方法であって、
第１ステップでは成形助剤に含まれるポリグリコールとモンタン蝋が一緒に溶解され、 第２ステップでは第１ステップにより製造された成形助剤が金属材料および／またはプラスチック材料に添加される方法。A method for producing a mixture according to claim 1 or 2 , comprising:
In the first step, the polyglycol and montan wax contained in the molding aid are dissolved together, and in the second step, the molding aid produced by the first step is added to the metal material and / or plastic material. 第１ステップ後、得られて、形成されたポリグリコールとモンタン蝋とからなる熱溶物が粉砕または噴霧されることを特徴とする、請求項３に記載の方法。4. The method according to claim 3 , characterized in that, after the first step, the hot melt obtained and formed of polyglycol and montan wax is ground or sprayed. 請求項１または２に記載の混合物を製造するための方法であって、
第１ステップでは成形助剤に含まれるポリグリコールとモンタン蝋が一緒に混合され、 第２ステップでは第１ステップにより製造された成形助剤が金属材料および／またはプラスチック材料に添加される方法。 A method for producing a mixture according to claim 1 or 2 , comprising:
In the first step, polyglycol and montan wax contained in the molding aid are mixed together, and in the second step, the molding aid produced by the first step is added to the metal material and / or plastic material. 請求項１または２に記載の混合物の圧縮成形品を製造するための使用。 Use of the mixture according to claim 1 or 2 for producing a compression-molded article . 請求項１または２に記載の成形助剤。The molding aid according to claim 1 or 2 . 請求項１または２に記載の混合物から製造される成形体において、当該成形体が、圧縮成形工具の室温と６００ＭＰａの圧力とにおいてＩＳＯ ３９９５−１９８５により７．５５Ｎ／ｍｍ2よりも大きい圧粉体強度を有することを特徴とする成形体。3. A green body produced from the mixture according to claim 1 or 2 , wherein the green body is greater than 7.55 N / mm 2 according to ISO 3395-1985 at room temperature of the compression molding tool and at a pressure of 600 MPa. A molded article characterized by having strength. ８００ＭＰａと 圧縮成形工具の室温とにおいてＩＳＯ ３９２７−１９８５により少なくとも７．１４ｇ／ｃｍ3の圧粉密度を有することを特徴とする、請求項８に記載の成形体。Characterized in that it has a green density of at least 7.14 g / cm 3 by ISO 3927-1985 in the 800MPa at room temperature compression molding tool, molding according to claim 8.
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